<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>

</body>
<script type="javascript">
  lineBlock(isNotDoc)
  lineBlock(docVal)

  // isNotDoc
  const isNotDoc = ""

  /** docVal */
  const docVal = ""

  /*** lineBlock ***/
  function lineBlock(t) {
    return t
  }
</script>
</html>